get_device_reading · AC Infinity MCP: Risk & Policy

WHAT IT DOES

What get_device_reading does on AC Infinity MCP

AI agents call get_device_reading to retrieve information from AC Infinity MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get_device_reading needs a policy

This tool retrieves current sensor readings from AC Infinity climate control devices. As a read-only operation returning live data (temperature, humidity, CO2, etc.), it has no side effects, reversible operations, or destructive capabilities. The blast radius of misuse is minimal—an AI agent could only obtain environmental data, not alter equipment state or cause harm.

From the tool's definition Tool name 'get_device_reading' indicates data retrieval from AC Infinity controllers. Server description confirms it enables reading 'live sensor data' without modifying state. No parameters provided suggesting side effects.

Attacks that exploit this kind of access

Questions about get_device_reading

What does the get_device_reading tool do? +

get_device_reading. It is categorised as a Read tool in the AC Infinity MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_device_reading? +

Register the AC Infinity MCP server in PolicyLayer and add a rule for get_device_reading: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches AC Infinity MCP. Nothing to install.

What risk level is get_device_reading? +

get_device_reading is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_device_reading? +

Yes. Add a rate_limit block to the get_device_reading rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block get_device_reading completely? +

Set action: deny in the PolicyLayer policy for get_device_reading. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides get_device_reading? +

get_device_reading is provided by the AC Infinity MCP server (ober37/ac-infinity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.